Federal prosecutors are investigating two men accused of illegally trying to ship technology made in Santa Rosa to China. A recently unsealed indictment says the men, both from China, tried to illegally obtain a DTX-150 Automatic Diamond Scriber Breaker machine from Santa Rosa-based Dynatex International. The machine is used to cut thin semiconductors, also called silicon wafers. The men are charged with conspiracy to violate the International Emergency Economic Powers Act, false electronic export information activities, smuggling, and other crimes.